NEET Zoology Human Excretory System MCQ Question
Which of the following statements about the human excretory system is correct?
The urine formed is slightly acidic and has a characteristic odour.
Uric acid is the most toxic nitrogenous waste excreted by terrestrial animals.
The micturition reflex initiates the contraction of smooth muscles of the urethra only.
Dialysis fluid contains all constituents found in urine, including urea.
Correct Answer
Detailed Explanation
The urine formed in humans is described as slightly acidic (pH-6.0) and has a characteristic odour, as noted in the NCERT context. Uric acid, while less toxic, is not the main nitrogenous waste in humans, and the micturition reflex involves the bladder, not just the urethra. Dialysis fluid does not contain urea, which is a waste product.
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